1·Because of longer life spans, Americans are also boosting their savings to preserve their nest eggs, the TD Ameritrade study showed, which surveyed 2,000 adults between 40 to 79.
德美利证券公司的该项研究调查了2000名40至79岁的成人，研究表明，由于寿命延长，美国人也在增加储蓄以留存养老储备金。
2·Most animals have relatively short life spans anyway.
总之，大多数相关动物的生命是不长的。
3·Nations are not like humans, with predictable life spans.
人类有可预测的寿命，国家则不同。
4·Japan has one of the world's longest average life spans.
日本是世界上平均寿命最高的国家之一。
5·We studied them for several of their life spans, which didn't take long.
它们的生命并不长。
6·What to Expect: X-Ray Vision, Doubled Life Spans and Lots of robots!
未来有什么：X光视界，两倍寿命和数不清的机器人？
7·Areas with the shortest expected life spans are largely in the South.
预期寿命最短的地区主要集中于南方。
8·We're buying more and more things with shorter and shorter life spans.
我们买了越来越多的东西，但它们的寿命却越来越短。
9·So is there truth to the claim that shorter people have longer life spans?
矮个子寿命更长这种说法是否是事实呢？
10·Other studies find a definite link between pollution and shorter life spans.
其他研究发现，污染和寿命缩短之间存在明确联系。